Author Topic: Suggestions for Hubble Zoo tutorials  (Read 12456 times)

Alice

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Suggestions for Hubble Zoo tutorials
« on: July 30, 2010, 11:02:32 pm »
As I highlighted in my Object of the Day on Thursday, we have a need for some tutorials coming up.

It is my impression that we need to write some help for each other on:

- What to do with very faint/fuzzy images
- How to use the data you are now given in My Galaxies
- How to do things such as zooming

What else?

Please put your suggestions here. If you feel confident with any of these, please write a summary here and feel free to start draft tutorials. You can start them in new topics if you like, and I will link them. When one is ready, it will go up in "Astronomy at Galaxy Zoo" or a sticky here at Hubble Zoo, or both - whatever we decide is most appropriate.

Looking forward to what you all come up with. ;D

Budgieye

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Re: Suggestions for Hubble Zoo tutorials
« Reply #1 on: July 31, 2010, 05:09:09 am »
We need a reminder to link from My Galaxies to get the hot http://www.galaxyzoo.org/examine/AHZxxxxxxaa

I don't think it is possible to get the AHZ number any other way.

Alice

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Re: Suggestions for Hubble Zoo tutorials
« Reply #2 on: July 31, 2010, 11:08:46 am »
What about a screenshot of what you get in My Galaxies and a description of what everything is?

paulrogers

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Re: Suggestions for Hubble Zoo tutorials
« Reply #3 on: July 31, 2010, 04:09:16 pm »
1) Instructions on the proper reference link to include in a posting, i.e. to the "examine" page.  I've been seeing many postings with an image and link to the image, but no telling what it relates to. :-\  Sometimes people type in an AHZ number, but doing a "Copy link location" (at least that's how it's done in Firefox) from the "View more information" link and pasting that in is so much more helpful! :D  See below.

2) Instructions on interpreting the orange/blue misregistrations.  Swengineer is doing some "reconstructions".  In some cases it shows different types of stars and what's going on where in the galaxy.  For example:

http://www.galaxyzoo.org/examine/AHZ40002dl
Shows a lenticular with fairly consistent images at both wavelengths, but the other galaxy shows a barred spiral of older, colder red stars with a fairly even distribution of new, hot blue stars.  Usually we see the new star formation in the arms.  This is a bit unusual.

swengineer

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Re: Suggestions for Hubble Zoo tutorials
« Reply #4 on: August 07, 2010, 04:46:23 pm »
As I highlighted in my Object of the Day on Thursday, we have a need for some tutorials coming up.

It is my impression that we need to write some help for each other on:

- What to do with very faint/fuzzy images
- How to use the data you are now given in My Galaxies
- How to do things such as zooming
- For fuzzy, faint images, I think building custom images from the data is the only hope.  I have posted a couple of examples in the 'Hubble:low surface brightness' thread.

- How to use / interpret the 'My Galaxies: Examine' data:  Some information exists in the discussion thread for the examine tool.  Michael Parrish promised a 'users guide', but he apparently has been busy with other tasks.

-How to zoom:  see my pseudo tutorial   ;D

Quote
What else?
- How to get spectra (where it exists) for objects in the GEMS, GOODS, and AEGIS surveys that (currently) source the actual Hubble images in GZ:Hubble.
- How to interpret said spectra given the wide variation in red-shifts that will exist.  (Budgieye has gone far down this path already.   :-* )
Quote
Please put your suggestions here. If you feel confident with any of these, please write a summary here and feel free to start draft tutorials. You can start them in new topics if you like, and I will link them. When one is ready, it will go up in "Astronomy at Galaxy Zoo" or a sticky here at Hubble Zoo, or both - whatever we decide is most appropriate.

Looking forward to what you all come up with. ;D

-Mark

paulrogers

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Re: Suggestions for Hubble Zoo tutorials
« Reply #5 on: August 08, 2010, 04:23:39 pm »
- How to get spectra (where it exists) for objects in the GEMS, GOODS, and AEGIS surveys that (currently) source the actual Hubble images in GZ:Hubble.
- How to interpret said spectra given the wide variation in red-shifts that will exist.  (Budgieye has gone far down this path already.   :-* )
= I haven't been able to get any spectra from/at AEGIS. :'(  I don't know if it's because I'm on a dial-up and the files are big, or the version of Java RE I have doesn't support their applet. :-\  I haven't been able to get information that would resolve the issue. :'(  I'd like to see something (maybe a test program/script) that says or determines Java compatibility. :)  Not everybody uses Windows! >:(
= I've read spectra since I was a Chemistry major in college, but they've always been of the nature of what we saw in the GZ2/SDSS project. :-*  I don't know how to read the sort of "bipolar(?)" things I've seen when others have posted AEGIS spectra and somehow the images were converted. :-\

c_cld

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Re: Suggestions for Hubble Zoo tutorials
« Reply #6 on: August 09, 2010, 07:27:35 am »
- How to get spectra (where it exists) for objects in the GEMS, GOODS, and AEGIS surveys that (currently) source the actual Hubble images in GZ:Hubble.
- How to interpret said spectra given the wide variation in red-shifts that will exist.  (Budgieye has gone far down this path already.   :-* )
= I haven't been able to get any spectra from/at AEGIS. :'(  I don't know if it's because I'm on a dial-up and the files are big, or the version of Java RE I have doesn't support their applet. :-\  I haven't been able to get information that would resolve the issue. :'(  I'd like to see something (maybe a test program/script) that says or determines Java compatibility. :)  Not everybody uses Windows! >:(
= I've read spectra since I was a Chemistry major in college, but they've always been of the nature of what we saw in the GZ2/SDSS project. :-*  I don't know how to read the sort of "bipolar(?)" things I've seen when others have posted AEGIS spectra and somehow the images were converted. :-\

Hi paulrogers,

- Suggestion: specview from stsci;
try To run an "empty" (no pre-loaded data) version of the Specview applet, use the "Run" link instead.
Run
for compatibilty see Specview requirements

- About spectrum *.fits file, as its size is very low (15 Kb to 400Kb) compared to pics, the best way is to download the file on your computer before opening it by any applet of your choice. Some spectrum you could use are in Bill's Kitt peak spectra:
Presenting - the People's Choice spectra!

I've no background on spectra so I can't use this tool and many others ((Topcat, SplatVO, fv,..) for analyzing: I'm not able to fit the spectrum or to determine the identifiers lines peaks or throughs...so I've to acquire some knowledge on top of software usage ;)

c_cld

paulrogers

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Re: Suggestions for Hubble Zoo tutorials
« Reply #7 on: August 09, 2010, 05:44:55 pm »
- Suggestion: specview from stsci;
try To run an "empty" (no pre-loaded data) version of the Specview applet, use the "Run" link instead.
Run
for compatibilty see Specview requirements

- About spectrum *.fits file, as its size is very low (15 Kb to 400Kb) compared to pics, the best way is to download the file on your computer before opening it by any applet of your choice. Some spectrum you could use are in Bill's Kitt peak spectra:
Presenting - the People's Choice spectra!

I checked the requirements first:
Specview Version 2.14.4 was tested under these configurations:
OS Version                    Java Version
Sun Solaris 8 (release 5.8 ) 1.6.0
Linux Red Hat 8                 1.6.0_02
Mac OS X 10.4.11             1.5.0_13
Windows XP Pro 2002        1.6.0_04
Windows XP 2002 Home     1.6.0_04

I've made all my "production" Linux systems with the requirement that they run on a Pentium; "acceptably" so on a "high-end" Pentium(-I) 233 MMX, because that was what I had. :P  It required some "compromises", among them JRE-1.5.0.14.  It looked possible, because of the Mac requirement, so I tried the demo and after ignoring its certificate problem sat there watching the Java logo spin for several minutes. :'( 

I've now got that running on a Pentium-3.  In my spare time I'm rebuilding a somewhat more modern version, if still slim & svelte by modern distro standards ;) , so maybe I'll be able to run 1.6 after all that.  But I don't anticipate finishing anytime soon--what I have works too well for most things. ::)

p.s.
Maybe I didn't wait long enough? ::)  About 10 minutes later I got a little window popping up asking if I wanted to stop reading some ".hut" file.  Guess it's not an application for anyone on a 40kbps dialup line. :-\

JAMartins

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Re: Suggestions for Hubble Zoo tutorials
« Reply #8 on: August 09, 2010, 06:18:04 pm »
.
.
.


I checked the requirements first:
Specview Version 2.14.4 was tested under these configurations:
OS Version                    Java Version
Sun Solaris 8 (release 5.8 ) 1.6.0
Linux Red Hat 8                 1.6.0_02
Mac OS X 10.4.11             1.5.0_13
Windows XP Pro 2002        1.6.0_04
Windows XP 2002 Home     1.6.0_04
.
.
.


The situation is more Java version "related" than an Operating System issue.

Solaris is a good Unix, now in Version 10;

And as you said: "I've now got that running on a Pentium-3".
See (http://www.sun.com/bigadmin/hcl/)

And you have a nice "production" Unix system.
... and you can even try OpenSolaris

JAMartins

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Re: Suggestions for Hubble Zoo tutorials
« Reply #9 on: August 11, 2010, 08:57:37 pm »
Solaris is a good Unix, now in Version 10;
"Sic transit gloria mundi."  Larry has a certain "reputation".
...better than a "wrong" one....  :)

PeterD

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Re: Suggestions for Hubble Zoo tutorials
« Reply #10 on: August 13, 2010, 09:29:31 am »
As a non-specialist can I throw in the following:

  • We need slightly clearer instructions on what to post where  [With this might go a revision of some aspects of the forum templates, so that chains of responses are more clearly organised in order that people can understand better what is actually being discussed]. Replies could also be more compact (eg you shouldn't need to get the image re-posted in every reply about it). Easier reading of the chains makes for better communication and learning by all
  • Similarly users should have it made clearer how to get advice on a particular topic, so that someone with some professional know-how answers queries about how to do X. This is different from "how to get an astronomer to look at what you have found"! although some consideration might be given to that
  • in terms of tools it might be possible to offer guidance on how to post-process images if people want to. With the red/blue irregular objects in GZ:H that is clearly an area where more than one or two of us could help. My guess (FWIW) is that some/a lot of the objects could have structure n them which would become evident with PP. In part this has been discussed elsewhere in this forum, but if we are going to go down this route there needs to be some agreed procedure so that we are comparing like with like.

Hope that this is of some help.

Peter
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paulrogers

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Re: Suggestions for Hubble Zoo tutorials
« Reply #11 on: August 19, 2010, 04:34:18 pm »
Newbies are constantly posting "bamboo pictures".  Somehow they're not being attracted to the "How to identify" or "What is it?" pages.

Bruno

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Re: Suggestions for Hubble Zoo tutorials
« Reply #12 on: August 20, 2010, 04:43:27 pm »
I agree with paulrogers: a lot of zooites post clumps for QSO or AGN without any proof..... :(
Ciao
Bruno

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rotar

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Re: Suggestions for Hubble Zoo tutorials
« Reply #13 on: August 23, 2010, 03:37:02 pm »

It is my impression that we need to write some help for each other on:

- What to do with very faint/fuzzy images
-
On a very fuzzy images can apply a transform (numerical  fast fourier transform ) for made one clear .
VIRGULARIZAREA FRAZARILOR EXPRIMATIUNII IN CONOTATII ADIACENTE..

paulrogers

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Re: Suggestions for Hubble Zoo tutorials
« Reply #14 on: August 23, 2010, 04:21:12 pm »
It is my impression that we need to write some help for each other on:
- What to do with very faint/fuzzy images
-
On a very fuzzy images can apply a transform (numerical  fast fourier transform ) for made one clear .
We have an old expression, "You can't make a silk purse out of a sow's ear."  An FFT or convolution makes presumptions about the nature of the original object.  What we would see is more about the mathematics than the object.